Former Minuteman commander Robert Salas maintains that he reported the incident to the UFO task force last year.
The space probe, which landed in the Elysium Planitia region of Mars in 2018, is now in its final months.
The first congressional UFO hearing in 50 years offered greater transparency, but no concrete evidence of aliens.
An innocuous snap of a delivery robot wandering through some woodland has been gaining a lot of attention on Twitter.
A new documentary exploring sightings of Bigfoot in a notorious area of Massachusetts is now available to watch for free.
The remarkable success story saw the population grow from a mere 10 individuals in 1991 to over 400 today.
Businessman Russ Kellett maintains that he has had close encounters with alien visitors since he was 16.
The eruption, which occurred in January, was larger than any other eruption or atomic bomb detonation in the last 100 years.
These giant 'scratches' on the surface of the Red Planet were captured on camera by ESA's Mars Express orbiter.
The sinkholes in China's Hubei province are so large that it's possible to find whole ecosystems inside them.
Scientists have produced an audio clip from acoustic waves propagating through the gas around a supermassive black hole.
Researcher Charles Paxton takes a look back over the history of the world's most famous lake monster.
Two researchers have come up with a possible answer as to why we have yet to encounter intelligent aliens.
Astronomers have captured the first ever image of the supermassive black hole at the center of our galaxy.
NASA's Curiosity rover has captured a photograph of what appears to be a doorway carved into the rock.
An airline flight from Israel to Turkey was forced to turn around after passengers received unnerving images on their phones.
Treasure hunters have found a metal canister that could contain hundreds of millions of dollars worth of stolen valuables.
The hearing - which will focus on the potential security risks - will reportedly feature the testimony of two Pentagon officials.
The automotive giant is working on developing a car capable of transitioning to a four-legged walking machine.
Prof Roger Jones - who works at the Large Hadron Collider at Cern - looks at the future of physics discoveries.